forked from OSchip/llvm-project
202 lines
7.2 KiB
C++
202 lines
7.2 KiB
C++
//===-- asan_interceptors.cc ----------------------------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// This file is a part of AddressSanitizer, an address sanity checker.
|
|
//
|
|
// Interceptors for operators new and delete.
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "asan_allocator.h"
|
|
#include "asan_internal.h"
|
|
#include "asan_stack.h"
|
|
|
|
#include "interception/interception.h"
|
|
|
|
#include <stddef.h>
|
|
|
|
// C++ operators can't have dllexport attributes on Windows. We export them
|
|
// anyway by passing extra -export flags to the linker, which is exactly that
|
|
// dllexport would normally do. We need to export them in order to make the
|
|
// VS2015 dynamic CRT (MD) work.
|
|
#if SANITIZER_WINDOWS
|
|
#define CXX_OPERATOR_ATTRIBUTE
|
|
#define COMMENT_EXPORT(sym) __pragma(comment(linker, "/export:"##sym))
|
|
#ifdef _WIN64
|
|
COMMENT_EXPORT("??2@YAPEAX_K@Z") // operator new
|
|
COMMENT_EXPORT("??2@YAPEAX_KAEBUnothrow_t@std@@@Z") // operator new nothrow
|
|
COMMENT_EXPORT("??3@YAXPEAX@Z") // operator delete
|
|
COMMENT_EXPORT("??3@YAXPEAX_K@Z") // sized operator delete
|
|
COMMENT_EXPORT("??_U@YAPEAX_K@Z") // operator new[]
|
|
COMMENT_EXPORT("??_V@YAXPEAX@Z") // operator delete[]
|
|
#else
|
|
COMMENT_EXPORT("??2@YAPAXI@Z") // operator new
|
|
COMMENT_EXPORT("??2@YAPAXIABUnothrow_t@std@@@Z") // operator new nothrow
|
|
COMMENT_EXPORT("??3@YAXPAX@Z") // operator delete
|
|
COMMENT_EXPORT("??3@YAXPAXI@Z") // sized operator delete
|
|
COMMENT_EXPORT("??_U@YAPAXI@Z") // operator new[]
|
|
COMMENT_EXPORT("??_V@YAXPAX@Z") // operator delete[]
|
|
#endif
|
|
#undef COMMENT_EXPORT
|
|
#else
|
|
#define CXX_OPERATOR_ATTRIBUTE INTERCEPTOR_ATTRIBUTE
|
|
#endif
|
|
|
|
using namespace __asan; // NOLINT
|
|
|
|
// FreeBSD prior v9.2 have wrong definition of 'size_t'.
|
|
// http://svnweb.freebsd.org/base?view=revision&revision=232261
|
|
#if SANITIZER_FREEBSD && SANITIZER_WORDSIZE == 32
|
|
#include <sys/param.h>
|
|
#if __FreeBSD_version <= 902001 // v9.2
|
|
#define size_t unsigned
|
|
#endif // __FreeBSD_version
|
|
#endif // SANITIZER_FREEBSD && SANITIZER_WORDSIZE == 32
|
|
|
|
// This code has issues on OSX.
|
|
// See https://github.com/google/sanitizers/issues/131.
|
|
|
|
// Fake std::nothrow_t and std::align_val_t to avoid including <new>.
|
|
namespace std {
|
|
struct nothrow_t {};
|
|
enum class align_val_t: size_t {};
|
|
} // namespace std
|
|
|
|
// TODO(alekseys): throw std::bad_alloc instead of dying on OOM.
|
|
#define OPERATOR_NEW_BODY(type, nothrow) \
|
|
GET_STACK_TRACE_MALLOC;\
|
|
void *res = asan_memalign(0, size, &stack, type);\
|
|
if (!nothrow && UNLIKELY(!res)) DieOnFailure::OnOOM();\
|
|
return res;
|
|
#define OPERATOR_NEW_BODY_ALIGN(type, nothrow) \
|
|
GET_STACK_TRACE_MALLOC;\
|
|
void *res = asan_memalign((uptr)align, size, &stack, type);\
|
|
if (!nothrow && UNLIKELY(!res)) DieOnFailure::OnOOM();\
|
|
return res;
|
|
|
|
// On OS X it's not enough to just provide our own 'operator new' and
|
|
// 'operator delete' implementations, because they're going to be in the
|
|
// runtime dylib, and the main executable will depend on both the runtime
|
|
// dylib and libstdc++, each of those'll have its implementation of new and
|
|
// delete.
|
|
// To make sure that C++ allocation/deallocation operators are overridden on
|
|
// OS X we need to intercept them using their mangled names.
|
|
#if !SANITIZER_MAC
|
|
CXX_OPERATOR_ATTRIBUTE
|
|
void *operator new(size_t size)
|
|
{ OPERATOR_NEW_BODY(FROM_NEW, false /*nothrow*/); }
|
|
CXX_OPERATOR_ATTRIBUTE
|
|
void *operator new[](size_t size)
|
|
{ OPERATOR_NEW_BODY(FROM_NEW_BR, false /*nothrow*/); }
|
|
CXX_OPERATOR_ATTRIBUTE
|
|
void *operator new(size_t size, std::nothrow_t const&)
|
|
{ OPERATOR_NEW_BODY(FROM_NEW, true /*nothrow*/); }
|
|
CXX_OPERATOR_ATTRIBUTE
|
|
void *operator new[](size_t size, std::nothrow_t const&)
|
|
{ OPERATOR_NEW_BODY(FROM_NEW_BR, true /*nothrow*/); }
|
|
CXX_OPERATOR_ATTRIBUTE
|
|
void *operator new(size_t size, std::align_val_t align)
|
|
{ OPERATOR_NEW_BODY_ALIGN(FROM_NEW, false /*nothrow*/); }
|
|
CXX_OPERATOR_ATTRIBUTE
|
|
void *operator new[](size_t size, std::align_val_t align)
|
|
{ OPERATOR_NEW_BODY_ALIGN(FROM_NEW_BR, false /*nothrow*/); }
|
|
CXX_OPERATOR_ATTRIBUTE
|
|
void *operator new(size_t size, std::align_val_t align, std::nothrow_t const&)
|
|
{ OPERATOR_NEW_BODY_ALIGN(FROM_NEW, true /*nothrow*/); }
|
|
CXX_OPERATOR_ATTRIBUTE
|
|
void *operator new[](size_t size, std::align_val_t align, std::nothrow_t const&)
|
|
{ OPERATOR_NEW_BODY_ALIGN(FROM_NEW_BR, true /*nothrow*/); }
|
|
|
|
#else // SANITIZER_MAC
|
|
INTERCEPTOR(void *, _Znwm, size_t size) {
|
|
OPERATOR_NEW_BODY(FROM_NEW, false /*nothrow*/);
|
|
}
|
|
INTERCEPTOR(void *, _Znam, size_t size) {
|
|
OPERATOR_NEW_BODY(FROM_NEW_BR, false /*nothrow*/);
|
|
}
|
|
INTERCEPTOR(void *, _ZnwmRKSt9nothrow_t, size_t size, std::nothrow_t const&) {
|
|
OPERATOR_NEW_BODY(FROM_NEW, true /*nothrow*/);
|
|
}
|
|
INTERCEPTOR(void *, _ZnamRKSt9nothrow_t, size_t size, std::nothrow_t const&) {
|
|
OPERATOR_NEW_BODY(FROM_NEW_BR, true /*nothrow*/);
|
|
}
|
|
#endif
|
|
|
|
#define OPERATOR_DELETE_BODY(type) \
|
|
GET_STACK_TRACE_FREE;\
|
|
asan_free(ptr, &stack, type);
|
|
|
|
#if !SANITIZER_MAC
|
|
CXX_OPERATOR_ATTRIBUTE
|
|
void operator delete(void *ptr) NOEXCEPT {
|
|
OPERATOR_DELETE_BODY(FROM_NEW);
|
|
}
|
|
CXX_OPERATOR_ATTRIBUTE
|
|
void operator delete[](void *ptr) NOEXCEPT {
|
|
OPERATOR_DELETE_BODY(FROM_NEW_BR);
|
|
}
|
|
CXX_OPERATOR_ATTRIBUTE
|
|
void operator delete(void *ptr, std::nothrow_t const&) {
|
|
OPERATOR_DELETE_BODY(FROM_NEW);
|
|
}
|
|
CXX_OPERATOR_ATTRIBUTE
|
|
void operator delete[](void *ptr, std::nothrow_t const&) {
|
|
OPERATOR_DELETE_BODY(FROM_NEW_BR);
|
|
}
|
|
CXX_OPERATOR_ATTRIBUTE
|
|
void operator delete(void *ptr, size_t size) NOEXCEPT {
|
|
GET_STACK_TRACE_FREE;
|
|
asan_sized_free(ptr, size, &stack, FROM_NEW);
|
|
}
|
|
CXX_OPERATOR_ATTRIBUTE
|
|
void operator delete[](void *ptr, size_t size) NOEXCEPT {
|
|
GET_STACK_TRACE_FREE;
|
|
asan_sized_free(ptr, size, &stack, FROM_NEW_BR);
|
|
}
|
|
CXX_OPERATOR_ATTRIBUTE
|
|
void operator delete(void *ptr, std::align_val_t) NOEXCEPT {
|
|
OPERATOR_DELETE_BODY(FROM_NEW);
|
|
}
|
|
CXX_OPERATOR_ATTRIBUTE
|
|
void operator delete[](void *ptr, std::align_val_t) NOEXCEPT {
|
|
OPERATOR_DELETE_BODY(FROM_NEW_BR);
|
|
}
|
|
CXX_OPERATOR_ATTRIBUTE
|
|
void operator delete(void *ptr, std::align_val_t, std::nothrow_t const&) {
|
|
OPERATOR_DELETE_BODY(FROM_NEW);
|
|
}
|
|
CXX_OPERATOR_ATTRIBUTE
|
|
void operator delete[](void *ptr, std::align_val_t, std::nothrow_t const&) {
|
|
OPERATOR_DELETE_BODY(FROM_NEW_BR);
|
|
}
|
|
CXX_OPERATOR_ATTRIBUTE
|
|
void operator delete(void *ptr, size_t size, std::align_val_t) NOEXCEPT {
|
|
GET_STACK_TRACE_FREE;
|
|
asan_sized_free(ptr, size, &stack, FROM_NEW);
|
|
}
|
|
CXX_OPERATOR_ATTRIBUTE
|
|
void operator delete[](void *ptr, size_t size, std::align_val_t) NOEXCEPT {
|
|
GET_STACK_TRACE_FREE;
|
|
asan_sized_free(ptr, size, &stack, FROM_NEW_BR);
|
|
}
|
|
|
|
#else // SANITIZER_MAC
|
|
INTERCEPTOR(void, _ZdlPv, void *ptr) {
|
|
OPERATOR_DELETE_BODY(FROM_NEW);
|
|
}
|
|
INTERCEPTOR(void, _ZdaPv, void *ptr) {
|
|
OPERATOR_DELETE_BODY(FROM_NEW_BR);
|
|
}
|
|
INTERCEPTOR(void, _ZdlPvRKSt9nothrow_t, void *ptr, std::nothrow_t const&) {
|
|
OPERATOR_DELETE_BODY(FROM_NEW);
|
|
}
|
|
INTERCEPTOR(void, _ZdaPvRKSt9nothrow_t, void *ptr, std::nothrow_t const&) {
|
|
OPERATOR_DELETE_BODY(FROM_NEW_BR);
|
|
}
|
|
#endif
|